Hired Cozy World initially to check out a Lennox furnace on a house we were planning on putting an offer on. Found Cozy World on Homestars well rated. The issue with the furnace turned out to be minor so we brought the house. A few months later, we found the Lennox air conditioner was not working. We couldn't check the AC out prior to purchase as it was freezing when we brought the house. Called Cozy World (Sina) again and it turned out that there was no gas in the coils. Cost to fix the coils and replace the gas was $1800. Cost of a new Lennox AC was $2900 +tax and we get a warranty with that. We were a little hesitant to buy a Lennox given that the one that broke was only 5 years old. Unfortunately, when a new owner takes over the furnace, the parts warranty goes from 10 years to 5 and we brought the house at the 5 year mark. Cozy World assured us that it was likely an installation issue and not a Lennox issue. New AC unit working well. Installation work and service by Sina was well done. Time will tell about the Lennox product itself. We have never had a Lennox AC or furnace before. We previously had a Goodman furnace and AC which was 10 years old when we moved and never had an issue.
We would highly recommend the services of Cozy World. We found them responsive, professional and reliable and plan on using them next year for furnace maintenance.
I will write back again if there is an issue with the product in the future.